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Kuster ~ Atomic Models and their Scientists

Total questions: 47

Worksheet time: 2hrs 9mins

Name
Class
Date
1.
Who believed that electrons were scattered amongst positively charged material.
a)
JJ Thomson
b)
Ernest Rutherford
c)
John Dalton
d)
Niels Bohr
2.
Believed that atoms are small, hard particles that were "indivisible"
a)
Democritus
b)
Aristotle
c)
Schrodinger
d)
Greek Philosophers
3.
Discovered that the atom has a small, dense, positively charged nucleus.
a)
Ernest Rutherford
b)
Heisenberg
c)
Democritus
d)
JJ Thomson
4.
Believed that electrons traveled around the nucleus in definite paths.
a)
Niels Bohr
b)
John Dalton
c)
Modern Atomic Theory
d)
Ernest Rutherford
5.
Determined that electron paths cannot be predicted and exist inside the Electron Cloud.
a)
Schrodinger & Heisenberg
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
6.
Believed that all atoms of the same element would be the same.
a)
John Dalton
b)
JJ Thomson
c)
Niels Bohr
d)
Modern Atomic Theory
7.
The following picture represents which atomic model?
a)
Niels Bohr
b)
Democritus
c)
Schrodinger & Heisenberg
d)
JJ Thomson
8.

Which one of the following discoveries came first?

a)

electrons

b)

neutrons

c)

quarks

d)

atoms

9.

Which scientist discovered electrons?

a)

Dalton

b)

Thomson

c)

Atristotle

d)

Bohr

10.

Rutherford and his students did experiments that determined the existence of a

a)

quark

b)

nucleus

c)

proton

d)

electron

11.

Bohr determined that electrons are exist in

a)

the nucleus

b)

inside protons

c)

electron cloud

d)

circular orbits around the nucleus

12.

The smallest particle of an element that still represents that element.

a)

Nucleus

b)

electron

c)

proton

d)

atom

13.

What is the center of an atom called?

a)

nucleus

b)

electron cloud

c)

proton center

d)

photon center

14.

Which one of the following parts of the atom is the smallest?

a)

neutron

b)

nucleus

c)

atom

15.

Proposed the uncertainty principle. A particle’s position, energy, and time can never be precisely known.

a)

Heisenberg

b)

Chadwick

c)

Bohr

d)

J J thomson

16.
Created a model of the atom with electrons moving around the nucleus in fixed orbits
a)
Bohr
b)
Dalton
c)
Heisenberg
d)
J J thomson
17.
Did the gold foil experiment
a)
Rutherford
b)
Dalton
c)
Democritus
d)
Heisenberg
18.
Hypothesized that the atom was a tiny hard sphere
a)
Dalton
b)
Rutherford
c)
Democritus
d)
J J thomson
19.
Discovered that the atom is mostly empty space
a)
Rutherford
b)
Dalton
c)
Democritus
d)
J J Thomson
20.
Used the cathode ray tube in his discovery
a)
J J thompson
b)
Dalton
c)
Chadwick
d)
Democritus
21.
Created the “plum pudding” model of the atom
a)
J J Thompson
b)
Chadwick
c)
Dalton
d)
Democritus
22.
Greek Philosopher
a)
Democritus
b)
Dalton
c)
J J Thompson
d)
Rutherford
23.
In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.
a)
Atoms
b)
Parts
c)
Molecules
d)
Hydrogen
24.
Which model is this?
a)
Thomson Model
b)
Cloud Model
c)
Bohr Model
d)
Rutherford Model
25.
While making his model of an atom, what structure did Rutherford discover (containing protons and neutrons)?
a)
the Nucleus
b)
the Electron Cloud
c)
the quarks
d)
the atomic mass
26.
According to the Bohr Model, electrons are only found in specific orbits around the nucleus called __________________________
a)
Energy Levels
b)
Electron Lanes
c)
Electron Places
d)
Atomic Mass
27.
Which model is this?
a)
Thomson Model
b)
Rutherford Model
c)
Cloud Model
d)
Bohr Model
28.
Which of these particles was discovered first?
a)
Protons
b)
Electrons
c)
Neutrons
d)
Quarks
29.
Who is the scientist who proposed the "solar system" model of an atom where the electrons revolve around the nucleus?
a)
Dalton
b)
Niels Bohr
c)
Ernest Rutherford
d)
Democritus
30.
Which scientist saw the atom as a solid sphere?
a)
Dalton
b)
Thomson
c)
Rutherford
d)
Bohr
31.

Which of the following is/are conclusions based on Rutherford’s gold foil experiment?

a)

Atom is mostly empty space

b)

The nucleus is positively charged

c)

The atom has a small dense nucleus

d)

All answers are correct

32.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
33.

Who discovered that the atom had an small, dense, positively charged center?

a)

Ernest Rutherford

b)

J.J Thomson

c)

Robert Millikan

d)

John Dalton

34.

Place the following atomic models in order, from earliest to latest:


A) Rutherford B) Thomson C) Dalton

a)

B, C, A

b)

C, A, B

c)

A, C, B

d)

C, B, A

35.
What can you conclude from the fact that scientists continue to update the atomic model?
a)
New information about atoms continues to be discovered
b)
Old information about atoms is completely useless
c)
Scientists did not have any information about atoms until a few years ago
d)
Scientists still have no idea what atoms look like
36.

Which scientists believed an atom was indivisible? (Choose all correct responses.)

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

37.

Which scientist proposed a new atomic model after discovering the electron in 1897?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

38.
What was wrong with Dalton's model of the atom?
a)
He said the atom had a dense, positive center.
b)
He said the atom was made of positive matter surrounding negative particles.
c)
He said atoms cannot be subdivided, created or destroyed.
d)
He said e- follow specific paths.
39.
Which is the current model of the atom?
a)
plum pudding model
b)
solar system model
c)
electron cloud
d)
solid sphere
40.
He believed matter was continuous (made of fire, water, air, and earth) and discredited Democritus' theory.
a)
Plato
b)
Galileo
c)
Aristotle
d)
Democritus
41.
John Dalton stated:
a)
elements are made of atoms
b)
atoms of a given element are identical
c)
atoms cannot be subdivided, created, nor destroyed
d)
all of the above
42.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
43.
A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass
a)
Electron Shells
b)
Orbitals
c)
Electron Cloud
d)
Nucleus
44.

Who started the modern day atomic theory of the atom?

a)

Democritus

b)

Dalton

c)

Thomson

d)

Bohr

45.

Which of the following is NOT a part of Dalton's atomic theory?

a)

All matter is composed of atoms and empty space

b)

Atoms are always in motion.

c)

Atoms of the same element are identical.

d)

Atoms can't be destroyed...merely re-arranged.

46.

Democritus AND Dalton did NOT believe that

a)

atoms are indivisible and indestructible

b)

all matter is made of atoms

c)

changes in matter are due to changes in groupings of atoms

d)

the nucleus is in the center of an atom

47.
Who discovered the proton and when did they do it?
a)
Rutherford in 1909
b)
Chadwick in 1808
c)
Democritus in 4th century BC
d)
Millikan in 1808

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